Blues boom. Anthem, WellPoint deal proceeds despite challenges.
D054598:Blue Cross Blue Shield Insurance Plans / Q000191:economics / Q000458:organization & administration*; D002140:California; D019981:Health Care Sector; D007196:Indiana; D007343:Insurance Carriers / Q000331:legislation & jurisprudence*; D009935:Organizational Affiliation / Q000331:legislation & jurisprudence*; D014481:United States